Portable high chair



FIG. 1 is a side elevation view of a portable high chair showing my design, with a fragmentary table top being shown in FIG. 1 for illustrative purposes only.

FIG. 2 is an overhead view of the high chair.

FIG. 3 is a front view of the high chair.

FIG. 4 is a front perspective view thereof. 

The ornamental design for a portable high chair, as shown and described. 